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Finding the Fourth Proportional to 1,881.70, 2,822.40 and 711.19

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Solution

The fourth proportional to 1,881.70, 2,822.40 and 711.19 is: 1,066.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.70 : 2,822.40 = 711.19 : x
  2. Step 2: Convert to fraction form
    1,881.70/2,822.40 = 711.19/x
  3. Step 3: Cross multiply
    1,881.70x = 2,822.40 × 711.19
  4. Step 4: Simplify right side
    1,881.70x = 2,007,262.66
  5. Step 5: Solve for x
    x = 2,007,262.66/1,881.70
  6. Step 6: Final answer
    x = 1,066.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.